Measuring Outcome in PSoriatic Arthritis (MOPSA), a new web-based tool for assessment of Psoriatic Arthritis (PsA): results of patient satisfaction audit


Elmamoun M, Szentpetery A, Gallagher P, FitzGerald O


Department of Rheumatology, St. Vincent’s University Hospital


Psoriatic Arthritis (PsA) affects about 30% of individual with psoriasis (1). PsA is a multifaceted disease that affects different domains. The five main domains that are affected are peripheral arthritis, axial disease, skin and nail disease, dactylitis, and enthesitis.

Minimal Disease Activity (MDA) is defined as a patient acceptable disease state which is increasingly recognised as a treatment target. MDA is defined when a patient has 5 of the following 7 criteria: tender joint count ≤ 1, swollen joint count ≤ 1, tender entheseal point ≤ 1, PASI ≤ 1 or body surface area ≤3%, Pain Visual analogue score (VAS) ≤ 15, patient global ≤ 20, Health Assessment Questionnaire ≤ 0.52. These criteria have been validated and can be used as a responder index in addition to a target for treatment interventions.

Composite Psoriatic Disease Activity Index (CPDAI) assesses the five domains in PsA. Within each domain a score (range 0–3) is assigned according to predefined cut-offs. The scores for each domain are then added together to give a final score range of 0–15, 0 for no disease and 15 for severe disease. (3)

Recently, Measuring Outcome in PSoriatic Arthritis (MOPSA), a new web-based tool for assessment of PsA was developed and is freely available to use (see https://mopsa.ie). MOPSA will determine MDA state and calculate CPDAI score.


46 patients with PsA, fulfilling CASPAR criteria, were included over a 2 month period.


Patients were required to complete both paper-based and online-based questionnaires. Half of patients filled one of the questionnaires first (either paper-based or online-based). Patient’s satisfaction survey forms were handed to patients following completion of paper-based and online-based questionnaires.


24 patients were females and 22 males. 85% of patients were 60 years old or younger. 64% of patients in paper-based group versus 78% of patients in online-based group completed the questionnaires in less than 10 minutes. 96% of patients found the online questionnaire easy to understand and indicated that they intend to use again.


On-line questionnaire using MOPSA was clearly time effective and the overwhelming majority of patients were happy to use it.